Apparatus for forming hollow sheet-metal bodies.



. ADRIANGE & A. C'ALLESON.

B APPARATUS FOR FORMING HOLLOW SHEET METAL BODIES.

APPLICATION FILED JUNE 25, 1908.

Patented Nov. 23, 1909 2HBETS-SHEET 1.

WITNESSES To all whom it may concem;

iinirnii riar atria ZFEGE.

BENJAMIN anmancn AND AMOS oALLEsoN, or 'BeooKLYn, New soak; earnCALLESON ASSIGNOR TO SAID ADRIANGE.

.AEPA'US FOR FORMING 'HOLLOW SHEET-METAL BODIES.

oaoeia.

Specification of Letters Patent. Patented lQQV, 23, 1%fiiidi Applicationfiled June 25 1908. Serial No. ts-0,313.

Be it known that we, BENJAMIN ADRTANCE and AMOS CALLESON, citizens ofthe United States, residing in Brooklyn, county. of Kings, State of NewYork, have invented certain new and useful Improvements in Apparatus,for- Forming Hollow Sheet- Metal Bodies; and we do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will en able others skilled in the art to which it appertains tomake and use the same, reference being had to the accon'ipanyingdrawings,

and to letters of reference marked thereon, which form a part of thisspecification.

The purpose of this invention is to provide a practical means forimparting to sheet metal vessels having plain or straight sides abulging form without the use of female dies or supporting means of anykind cooperating with the male die in giving the required shap'e to theside wall of the article.

In carrying out our invention, we provide a continuous series ofradially movable expanding members and an actuating member therefordisposed centrally and movable axially thereof, said expanding membersand the actuating member having a wedgedilze engagenuzntthe one with theother so that upon the dmvnward thrust of the latter the expandingmembers will be moved radially outwardly to expand the vessel being CF91ated upon; in addition, means is provided whereby, upon the returnmovement of the actuating member, the expanding members will retract totheir original position, 2'. 6., to an extent sullicient to permit themto clear the now relatively contracted mouth of'the vessel and,wl'iereby, thereupon, the actuating member will efi'ect the elevation,bodily, of the series oi expanding members so as to withdr; the wholefrom the vessel ready f r its; next operation on another vessel.

The invention trated in the wherein,

Figure 1 is a plan view of the device, herein termed a chuck forming thesubject hereof; Fig. 2 is a view showing the actuating member partly inside elevation and partly in vertical section and the series ofexpanding members in vertical: section, the plane of section beingsubstantially coin;

will be found fullyl illus eeei'anpanying drawing,

cident with the axis of the chuck; Fig. 3 is i a horizontal sectionalview on the line w-a3 of. Fig. 2; Fig. i is an isometric viewof one ofthe parts of the series of expanding members; and, Figs. 5 and 6 showthe vessel bean fore and after being-subjected to the action of thechuck. It will be understood that the chuck herein described is carriedby the vertiealigy mciprocating plunger of a suitable press, 55

which plunger operates toward and from the bed plate ofsueh a machine. V

Referring to Figs. 1, 2 and 3, a is the part hereinbefore referred to asthe actuating P 70 member This consists of the truncate cone 6 havingthe upwardly projecting stem 0, whereby to attach it'into the plunger(if the press, and a downwardly projecting stem d the lower end of thecone has the lesser d1ameter,.but that diameter is somewhat re greaterthan that of the stem d, so that a V .1! ,L T shoulder e is iornied.Onto-the stem at is fitted another truncated cone 7 whose lower end issubstantially flush with the end of stem (Z when said 'coneabuts, in theproper so arrangement or" the parts, against the shoulder in whichposition it may be held by the count rsunk head g of ascrew it. While min the foregoing and. in the drawings the two cones are represented asnon-integrai as parts and the cone is described as having a substantialsupport against the shoulder 6, so that to all eii'eets and purposes thetwo cones are as rigidly disposed relatively to each other as thoughthey were integral, it so limited to bodies, of

will be understood that we are not. forming said cones separate metal.

The upper of cone has a 'reater diameter than the loser end of coneforming the shoulder i. v

' y designates one of the parts forming the series or" tf iltli'ltliilgmembers. Each of these is shaped bstantialiy shown. in Fiat, 4., towiein i a, ing the upper tion in of its inside 3193 inclined at pitchcorresponding to that of he lower portion of i the cone a 3 thus subparallel with each other, and they joined by a surface at, substantiailyparaiiel; with the end faces of the part i, and item an abutment to takethe rims pact of the shoulder i of cone f.

o. corresponding to tha time as a sectonshape-d body I; ar too Thesurfaces in and Z are too.

' tuating member a, the surfaces 70 and Z of,

v The several parts Z are arranged in circuby. As a result of this, thevessel is allowed lar disposition, as best seen in Flg. 1, relal toassume a concave form in its base or bottively tomember a. They arefurthermore formed with a continuous external groove 71, which receivesan endless spiral spring 0 tending to contract the series and thus causethem to move bodily downward on the acsaid members bearing on the facesof the cones.

The acting portion of the expanding memhers is approximate to the lowerhalf, more or less, ther'eof; accordingly each part j has its outersurface in the lower part thereof convex, as at p.

In th epperation of the chuck, which is assumedgto be opcrativelyattached to the plunger'ofthe press, the vessel to be shaped is placedover the chuck which, at that time, is elevated from the bed plate andhas assumed its contracted form since, being clear of the bed platebeneath it, the spring 0 is free to draw the members i together to anextent limited by the contact of their abutments on with the shoulder i.\Vhen the plunger of the press descends, the vessel is brought againstits bed plate, directly taking the thrust of the members i whosedownward movement is thus checked. I It will be understood thatthevessel substantially fits the chuck in its contracted condition.Although the members 7' are prevented from further downward movement bythe opposition of the bed plate, the actuating member a is still freefor further downward movement, and as this now follows, the cones Z2 and7 cause the series of members 7' to be exanded, they acting to expand orbulge the essel. On the return or upward movementof the plunger of thepress, the spring 0 V operates to contract the members j as abovedescribed, this action continuing until the shoulder 2' takes againstabutments'm, whereupon the vessel may be removed from the chuck as soonas the chucl: has assumed the proper elevation relatively to thebedplate.

It will be observed that the bottom of the chuck is slightly concave,which effect is produced by imparting a slightly inclined disposition tothe lower face of each member tom wall.

It will be observed that the means acting to contract the series ofexpanding members is disposed between the lowermost and uppermost pointsof contact between said members and the actuating member, that is, in aplane cutting the Zone of wedge-engagement between the members; thus anytendency toward the producing of an oscillating or rocking movement onthe part of the ex panding members under the action of the actuatinginember, as might be possible were said means located outside of(insteadof between) these points, is prevented and each expanding membermoves inwardly under a condition of perfect face-to-face contact withthe actuating member.

Having thus-fully described our invention,

what we claim as new and desire to secure by Letters Patent is:

The combination, in a bulging chuck, of a continuous series of radiallymovable expanding members, said series of members havingdownwardlytapermg upper and lower inside face-portions and a shoulderbetween said upper and lower face-portions, an actuating membersurrounded by said expanding members and comprising a downwardlytapering truncated cone forming a shoulder at 1ts lower end, arelatively reduced stem pro1ect1ng from the lower end of said cone andanother downwardly tapering truncated cone arranged on said stem andabutting against the second named shoulder, said last-named cone havingits upper end larger than the lower end of the first-named cone andadapted to engage the first-named shoulder, and a contracting meanssurrounding said series-of expanding members, substantially asdescribed.

In testimony, that we claim the foregoing, we have hereunto set ourhands this 22" day of June, 1908. l

BENJAMIN ADRIAN-CE. AMOS CALLESON. Witnesses:

W. F. HORN, JAMES VAN WICKLEN.

